This is a rail mounted Endstop for use with Makerbot v1.2 Mechanical Endstops on a 16mm linear rail. Simple, solid construction. The Perfect way to stop your 3D printer from destroying itself is to add this Endstop mount. Not only does the mechanical switch turn off the motor's movement but the mount doubles as a physical stopper.

Mount Just Updated* 2/8/12
-Stronger
-Recess for Solder points